All ICD10 Codes
Chapter 6

G00–G99: Diseases of the Nervous System

Diseases of the Nervous System diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
All CodesBillable Only
Internal Codes
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  • G82.22—

    Paraplegia, incomplete

  • G82.5—

    Quadriplegia

  • G82.50—

    Quadriplegia, unspecified

  • G82.51—

    Quadriplegia, C1-C4 complete

  • G82.52—

    Quadriplegia, C1-C4 incomplete

  • G82.53—

    Quadriplegia, C5-C7 complete

  • G82.54—

    Quadriplegia, C5-C7 incomplete

  • G83—

    Other paralytic syndromes

  • G83.0—

    Diplegia of upper limbs

  • G83.1—

    Monoplegia of lower limb

  • G83.10—

    Monoplegia of lower limb affecting unspecified side

  • G83.11—

    Monoplegia of lower limb affecting right dominant side

  • G83.12—

    Monoplegia of lower limb affecting left dominant side

  • G83.13—

    Monoplegia of lower limb affecting right nondominant side

  • G83.14—

    Monoplegia of lower limb affecting left nondominant side

  • G83.2—

    Monoplegia of upper limb

  • G83.20—

    Monoplegia of upper limb affecting unspecified side

  • G83.21—

    Monoplegia of upper limb affecting right dominant side

  • G83.22—

    Monoplegia of upper limb affecting left dominant side

  • G83.23—

    Monoplegia of upper limb affecting right nondominant side

  • G83.24—

    Monoplegia of upper limb affecting left nondominant side

  • G83.3—

    Monoplegia, unspecified

  • G83.30—

    Monoplegia, unspecified affecting unspecified side

  • G83.31—

    Monoplegia, unspecified affecting right dominant side

  • G83.32—

    Monoplegia, unspecified affecting left dominant side

  • G83.33—

    Monoplegia, unspecified affecting right nondominant side

  • G83.34—

    Monoplegia, unspecified affecting left nondominant side

  • G83.4—

    Cauda equina syndrome

  • G83.5—

    Locked-in state

  • G83.8—

    Other specified paralytic syndromes

  • G83.81—

    Brown-Séquard syndrome

  • G83.82—

    Anterior cord syndrome

  • G83.83—

    Posterior cord syndrome

  • G83.84—

    Todd's paralysis (postepileptic)

  • G83.89—

    Other specified paralytic syndromes

  • G83.9—

    Paralytic syndrome, unspecified

  • G89—

    Pain, not elsewhere classified

  • G89.0—

    Central pain syndrome

  • G89.1—

    Acute pain, not elsewhere classified

  • G89.11—

    Acute pain due to trauma

  • G89.12—

    Acute post-thoracotomy pain

  • G89.18—

    Other acute postprocedural pain

  • G89.2—

    Chronic pain, not elsewhere classified

  • G89.21—

    Chronic pain due to trauma

  • G89.22—

    Chronic post-thoracotomy pain

  • G89.28—

    Other chronic postprocedural pain

  • G89.29—

    Other chronic pain

  • G89.3—

    Neoplasm related pain (acute) (chronic)

  • G89.4—

    Chronic pain syndrome

  • G90—

    Disorders of autonomic nervous system

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